JavaScript Interview Questions and Answers

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What is referential transparency?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What are the differences between pure and impure functions?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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How do you create your own bind method using either call or apply method?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What are the differences between primitives and non-primitives?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What is pass by value and pass by reference?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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How to verify if a variable is an array in Javascript?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What is an environment record?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What is optional chaining in Javascript?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What is throttling in Javascript?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What is debouncing in Javascript?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What is function execution context?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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What is global execution context in Javascript?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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How do you create custom HTML element?

asked Oct 26, 2023 in JavaScript by DavidAnderson

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How do you reverse an array without modifying original array?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What is the difference between setTimeout, setImmediate and process.nextTick?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What are the different ways to create sparse arrays?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What is the difference between dense and sparse arrays?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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How do you group and nest console output?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What is nullish coalescing operator (??)?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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How do style the console output using CSS?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What is the easiest way to ignore promise errors in Javascript?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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Is that possible to use expressions in switch cases?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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How to invoke an IIFE without any extra brackets?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What is the difference between isNaN and Number.isNaN?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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How do you define instance and non-instance properties in Javascript?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What are the differences between for...of and for...in statements

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What are the built-in iterables in Javascript?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What are the different kinds of generators in Javascript?

asked Oct 25, 2023 in JavaScript by DavidAnderson

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What are the differences between spread operator and rest parameter in Javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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What are the differences between arguments object and rest parameter in javascript?

asked Oct 24, 2023 in JavaScript by DavidAnderson

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